| Description | Date | Identifier | |
| Letter from E.K. Cole Ltd (EKCO) radio manufacturers, confirming receipt of blueprints. | 14th Dec 1935 | Box 63 \ 2 scan0176 | |
| Letter from Philips Lamps Limited regarding a dispatched power line for a car radio set. | 19th Dec 1935 | Box 63 \ 2 scan0177 | |
| Letter to Philips Lamps detailing test results and recommendations for a fuse and power line assembly. | 24th Dec 1935 | Box 63 \ 2 scan0178 | |
| Instruction to post a car radio set power line to Messrs. Philips Lamps, Ltd. | 24th Dec 1935 | Box 63 \ 2 scan0179 | |
| Letter from The General Electric Co. Ltd. regarding difficulties fitting their car radio into a new Bentley and the planned fitting to a Rolls-Royce Phantom III. | 31th Dec 1935 | Box 63 \ 2 scan0180 | |
| Letter from Philips Lamps Ltd. regarding a report on a power line test. | 2nd Jan 1935 | Box 63 \ 2 scan0181 | |
| Internal request for advice on choosing between three radio sets (Ekco, Philco, Marconi) for a customer's Bentley. | 7th Jan 1936 | Box 63 \ 2 scan0182 | |
| Choice and installation of a car radio for a Bentley chassis, B16-DK. | 8th Jan 1936 | Box 63 \ 2 scan0183 | |
| Request to order a multi-pin plug for a car radio from Messrs. E.K.Cole, Ltd. | 8th Jan 1936 | Box 63 \ 2 scan0184 | |
| Assessment of a car radio for Mr. Sclater-Booth's car, outlining the reasons for its unsuitability and discussing alternatives. | 9th Jan 1936 | Box 63 \ 2 scan0185 | |
| Installation of car radios, mentioning Philco sets, central lubrication pedal interference, and spark plug suppressors. | 9th Jan 1936 | Box 63 \ 2 scan0186 | |
| Letter from E.K. Cole Ltd regarding an order for a multi-pin plug for an EKCO Car Radio Receiver. | 16th Jan 1936 | Box 63 \ 2 scan0187 | |
| Follow-up memo requesting a reply concerning a car radio. | 30th Jan 1936 | Box 63 \ 2 scan0188 | |
| Letter discussing the installation and performance of car radios, requesting recommendations for a new Philco set. | 22th Jan 1936 | Box 63 \ 2 scan0189 | |
| Follow-up communication regarding the testing of a Philco car radio set on a 25/30 chassis. | 3rd Feb 1936 | Box 63 \ 2 scan0190 | |
| Letter from Philco Radio regarding an adverse report on the feedback of vibrator hum in the 803T car radio receiver. | 13th Feb 1936 | Box 63 \ 2 scan0191 | |
| Letter to Philco Radio & Television Corporation regarding a faulty 803T car radio receiver. | 14th Feb 1936 | Box 63 \ 2 scan0192 | |
| Letter concerning an application from the Marconi Company to test a wireless set for cars. | 27th Feb 1936 | Box 63 \ 2 scan0193 | |
| Typed letter from a Private Secretary to The Marconiphone Co. Ltd. acknowledging a letter for Mr. Sidgreaves. | 17th Feb 1936 | Box 63 \ 2 scan0194 | |
| Requesting to change over a faulty Philco Radio set in a car for a replacement. | 27th Feb 1936 | Box 63 \ 2 scan0195 | |
| The trial of a Marconi Wireless Set and its suitability for installation. | 29th Feb 1936 | Box 63 \ 2 scan0196 | |
| Testing and return of a sample Marconi car radio set due to no available car for fitting. | 2nd Mar 1936 | Box 63 \ 2 scan0197 | |
| Performance of different wireless sets and their installation methods. | 3rd Mar 1936 | Box 63 \ 2 scan0198 | |
| Performance of Marconi wireless sets and the challenges of achieving consistent results with car installations. | 4th Mar 1936 | Box 63 \ 2 scan0199 | |
| Clarifying the performance of in-car wireless sets, emphasising the method of installation over the make of the set. | 1st Mar 1936 | Box 63 \ 2 scan0200 | |
| Letter from Marconiphone Company Limited regarding the fitting of car radios and a returned receiver for testing. | 5th Mar 1936 | Box 63 \ 2 scan0201 | |
| Arranging an appointment to examine a wireless set installation. | 7th Mar 1936 | Box 63 \ 2 scan0202 | |
| Letter regarding a missed appointment and rescheduling to view a car for a wireless set installation. | 9th Mar 1936 | Box 63 \ 2 scan0203 | |
| Return of a faulty Philco Radio Set Type 803T for a replacement. | 9th Feb 1936 | Box 63 \ 2 scan0204 | |
| Radio interference issues with a Philco wireless set. | 16th Mar 1936 | Box 63 \ 2 scan0205 | |
| Letter discussing static current effect on wireless sets and the testing of a new Philco set. | 23th Mar 1936 | Box 63 \ 2 scan0206 | |
| Formal acknowledgment from EMI Service Ltd. for the receipt of an unexamined Marconiphone Car Radio model 536. | 8th Jun 1938 | Box 63 \ 2 scan0207 | |
| The re-arrangement of a wireless set installation in a car to improve results. | 28th Apr 1936 | Box 63 \ 2 scan0208 | |
| Letter proposing a visit to Messrs. K.L.G. to examine and test wireless set installations. | 29th Apr 1936 | Box 63 \ 2 scan0209 | |
| Arrangements for a car and a meeting to inspect a wireless set installation. | 30th Apr 1936 | Box 63 \ 2 scan0210 | |
| Letter from Delco-Remy & Hyatt Ltd. regarding a fix for wheel static interfering with car radio reception. | 1st May 1936 | Box 63 \ 2 scan0211 | |
| Query regarding a wheel modification to the brake mechanism to cure radio static when fitting Delco-Remy car radio sets. | 4th May 1936 | Box 63 \ 2 scan0212 | |
| Confirming travel and meeting arrangements to report on the performance of a wireless set. | 4th May 1936 | Box 63 \ 2 scan0213 | |
| Letter to Delco-Remy & Hyatt Ltd. regarding a suggestion they had made. | 4th May 1936 | Box 63 \ 2 scan0214 | |
| Fix for 'wheel static' on 25 HP cars by machining brake drums. | 6th May 1936 | Box 63 \ 2 scan0215 | |
| Issues with wireless sets, including static noise and interference. | 6th May 1936 | Box 63 \ 2 scan0216 | |
| Issues with a modification to prevent 'wheel static' and proposing a new solution involving a contact brush. | 7th May 1936 | Box 63 \ 2 scan0217 | |
| 'wheel static' interference on cars, mentioning brake drum clearance and experiments with a contact brush. | 8th May 1936 | Box 63 \ 2 scan0218 | |
| Letter to Philco Radio & Television Corporation reporting the failure of a new car radio set being tested in a 25/30 HP chassis. | 9th May 1936 | Box 63 \ 2 scan0219 | |
| Prevention of radio interference in cars by improving wireless set installation. | 14th May 1936 | Box 63 \ 2 scan0220 | |
| Investigating and resolving radio interference caused by static current in the brake mechanism. | 14th May 1936 | Box 63 \ 2 scan0221 | |
| Static build-up from wheel bearings affecting wireless sets, requesting the creation of earthing contacts. | 11th May 1936 | Box 63 \ 2 scan0222 | |
| Letter from Ultra Electric Limited regarding the pricing and availability of their car radio receiver. | 12th May 1936 | Box 63 \ 2 scan0223 | |
| Letter to Philco Radio & Television Corporation regarding the performance of their in-car wireless set. | 13th May 1936 | Box 63 \ 2 scan0224 | |
| List of wiring and component specifications for a chassis. | 13th May 1936 | Box 63 \ 2 scan0225 | |
| Letter to Philips Lamps Ltd. enquiring about the supply of wiring and filters for car radio sets. | 14th May 1936 | Box 63 \ 2 scan0226 | |
| Letter from Philco Car Radio Division regarding the examination of an installation in a car. | 14th May 1936 | Box 63 \ 2 scan0227 | |
| Quotation from Philips Lamps Limited for a car radio battery lead and filter. | 21th May 1936 | Box 63 \ 2 scan0228 | |
| Letter from Philco Radio and Television Corporation regarding a report on Mr. Sidgreave's car. | 22th May 1936 | Box 63 \ 2 scan0229 | |
| Report concerning an unsatisfactory repair to an aerial on Mr. Sidgreave's car, resulting in continued engine noise. | 22th May 1936 | Box 63 \ 2 scan0230 | |
| Order for battery leads and filters for car radio sets from Philips Lamps Ltd. | 22th May 1936 | Box 63 \ 2 scan0231 | |
| Instruction to change a car radio (wireless set) on chassis 21-G-IV due to a suspected faulty valve. | 23th May 1936 | Box 63 \ 2 scan0232 | |
| Replacement of a faulty Philco car radio set from car 21-G-IV. | 4th Jun 1936 | Box 63 \ 2 scan0233 | |
| Follow-up communication regarding the issue of wheel static on cars. | 12th Jun 1936 | Box 63 \ 2 scan0234 | |
| Reply regarding wheel static on cars, stating that a report on the efficacy of parts cannot yet be provided as they have not been fitted. | 15th Jun 1936 | Box 63 \ 2 scan0235 | |
| Letter from Philco Radio regarding the disposal of a current model car radio receiver and the arrangement for a new model. | 19th Jun 1936 | Box 63 \ 2 scan0236 | |
| Letter from Erie Resistor Limited regarding a special brochure and the standardization of L 2 type Suppressors. | 25th Jun 1936 | Box 63 \ 2 scan0237 | |
| Brochure detailing the features, performance, and construction of Erie ignition suppressors and resistors. | 1st Jan 1934 | Box 63 \ 2 scan0238 | |
| Technical bulletin on various types of ignition suppressors, their installation, and performance characteristics. | 26th Jun 1936 | Box 63 \ 2 scan0239 | |
| Letter to Erie Resistor Ltd concerning suppressors. | 26th Jun 1936 | Box 63 \ 2 scan0240 | |
| Letter from Erie Resistor Limited to Mr. West regarding a potential future meeting. | 29th Jun 1936 | Box 63 \ 2 scan0241 | |
| Letter from Philco requesting the return of a car radio receiver on loan. | 2nd Jul 1936 | Box 63 \ 2 scan0242 | |
| Letter to Philco Radio & Television Corporation regarding the delayed return of a radio set fitted to an experimental car. | 3rd Jul 1936 | Box 63 \ 2 scan0243 | |
| Confirming a Philco car radio set is being sent to the Stores for despatch back to Philco after being loaned for experimental trial. | 6th Jul 1936 | Box 63 \ 2 scan0244 | |
| Letter from coachbuilder Hooper & Co. regarding the fitting of car radio sets. | 7th Jul 1936 | Box 63 \ 2 scan0245 | |
| Letter from Philco requesting the return or purchase of a car radio receiver on loan. | 9th Jul 1936 | Box 63 \ 2 scan0246 | |
| Apology letter to Philco Radio & Television Corporation for the delayed return of a car radio receiver. | 10th Jul 1936 | Box 63 \ 2 scan0247 | |
| Letter from Philco Radio discussing the delivery of a new car radio model and the options available. | 11th Jul 1936 | Box 63 \ 2 scan0248 | |
| Letter to Philco Radio & Television Corporation requesting dimensions and layout for new car radio sets. | 27th Jul 1936 | Box 63 \ 2 scan0249 | |
| The elimination of radio interference caused by wheel static on cars fitted with a radio. | 28th Jul 1936 | Box 63 \ 2 scan0250 | |
| Request to urgently issue instructions for modifying front wheel caps with earthing devices due to customer complaints. | 28th Jul 1936 | Box 63 \ 2 scan0251 | |
| Car failure caused by a lead wire fitted for a wireless system which acted as an earth. | 30th Jul 1936 | Box 63 \ 2 scan0252 | |
| Acknowledgement of order for a Model 901V Car Radio from Philco. | 31th Jul 1936 | Box 63 \ 2 scan0253 | |
| Short memo acknowledging a previous communication regarding 'Wireless'. | 31th Jul 1936 | Box 63 \ 2 scan0254 | |
| Letter from Philco Radio regarding the supply of a Model 901T car radio for testing. | 31th Jul 1936 | Box 63 \ 2 scan0255 | |
| Deprecating the practice of reducing the rotor blade gap in the distributor to eliminate radio interference. | 3rd Aug 1936 | Box 63 \ 2 scan0256 | |
| Ignition failures caused by the shorting of an earthing wire fitted to the main lead to prevent radio interference. | 4th Aug 1936 | Box 63 \ 2 scan0257 | |
| Letter to Philips Lamps Ltd. deprecating the substitution of the H.T. wire for a metal braided cable when fitting radios. | 4th Aug 1936 | Box 63 \ 2 scan0258 | |
| Letter to a radio manufacturer advising against the use of metal braided cable for the H.T. wire. | 4th Aug 1936 | Box 63 \ 2 scan0259 | |
| Letter to Messrs. Hoopers Ltd. regarding the fitting of car radio sets and suppressing radio interference. | 4th Aug 1936 | Box 63 \ 2 scan0260 | |
| Letter from Philips Lamps Ltd. regarding the fitting of H.T. wire for car radios. | 5th Aug 1936 | Box 63 \ 2 scan0261 | |
| Letter from Philco Radio concerning the installation of an H.T. wire and a previous complaint. | 7th Aug 1936 | Box 63 \ 2 scan0262 | |
| Requesting an update on a device to eliminate wheel static interference for wireless systems on cars. | 3rd Sep 1936 | Box 63 \ 2 scan0263 | |
| Chasing a reply for a scheme regarding wireless on cars, following a previous memo sent in error. | 4th Sep 1936 | Box 63 \ 2 scan0264 | |
| The development of an earthing scheme for wireless systems on cars. | 4th Sep 1936 | Box 63 \ 2 scan0265 | |
| Wireless earthing contact for the front hubs of Bentley, 25/30, and Phantom III cars. | 29th Sep 1936 | Box 63 \ 2 scan0266 | |
| Difficulties with fitting Philco wireless sets on the Phantom III. | 2nd Oct 1936 | Box 63 \ 2 scan0267 | |
| Philco Wireless and a proposed discussion with the Delco Remy Co. | 5th Oct 1936 | Box 63 \ 2 scan0268 | |
| Request to manufacture two sets of parts for an earth contact for front hubs, as per schedule N.Sch.4903. | 7th Oct 1936 | Box 63 \ 2 scan0269 | |
| Letter from Delco-Remy & Hyatt Ltd. regarding the fitting of a Philco Car Radio to a Phantom III model. | 7th Oct 1936 | Box 63 \ 2 scan0270 | |
| Letter to Delco-Remy & Hyatt Ltd. confirming arrangements for a representative's visit on Wednesday the 14th. | 8th Oct 1936 | Box 63 \ 2 scan0271 | |
| Letter from Delco-Remy & Hyatt Ltd. arranging a representative's visit concerning a Philco Car Radio. | 10th Oct 1936 | Box 63 \ 2 scan0272 | |
| New and other parts required for the earth contact in front hubs for various car models. | 16th Oct 1936 | Box 63 \ 2 scan0273 | |
| Parts list for Bentley (Present), Bentley III, and Wraith II models, with a note on required axle pivot modification. | 16th Oct 1936 | Box 63 \ 2 scan0274 | |
| Request to move a radio set from chassis 21-G-IV to chassis GAE-20 for further testing. | 16th Oct 1936 | Box 63 \ 2 scan0275 | |
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